Session Date/Time: 19 Mar 2024 23:30

v6ops

Summary

The v6ops meeting covered a variety of IPv6 deployment and operational topics. Presentations included updates on IPv6-only network deployments, multi-homing solutions, extension header implementation, renumbering challenges, and the impact of IPv6 on the DNS. A key theme was the need to address practical deployment issues and operational challenges faced by network operators.

Key Discussion Points

IPv6-Only Networks: Updates on deploying IPv6-only networks and the importance of transition mechanisms like CLAT and DNS64/Prefix64. Discussion around the requirements for IPv6-only capable devices.
Multi-Homing: Analysis of available multi-homing solutions for business sites, including native IPv6 solutions and translation-based approaches. Discussion of a survey regarding multi-homing configuration practices.
Extension Headers: Implementation of IPv6 extension headers using eBPF for network diagnostics and routing efficiency. Performance benchmarking compared to kernel implementation.
Renumbering: The problem of renumbering in different environments (ISP, Enterprise) and its implications on host address selection, including the limitations of rule 55. A proposal to make the router's link-local address dependent on assigned prefixes.
CLAT and IPv6 Transition: The challenges and "gotchas" of CLAT (Customer-side NAT64) deployment. Discussed problems about preferring IPv4 versus CLAT when the former is available. Importance of IPv6 addresses to implement stateless for tons of reasons.
v6 Mostly Deployment: Discussion of benefits of doing v6 mostly deployments, compared to IPv6 only. Focus on using Prefix64 instead of DNS64.
DNS and IPv6: Measurement data on IPv6 support and performance in the DNS. The prevalence of dual-stack resolvers and the lack of a strong IPv6 preference. The impact of fragmentation on DNSSEC and the need to avoid large UDP packets over IPv6.
CE Router Update: Review of draft update to RFC 7084, covering basic RFC updates, removal of transition text, and recommendations for ingress filtering. Discussion of incorporating PCP (Port Control Protocol) and NTP.

Decisions and Action Items

Home Gateway Prefix Delegation Document: Tim Winters' document on prefix delegation for home gateways is ready for working group last call.
Adopt CLAT Recommendations Document: Tommy Jensen's document on CLAT recommendations appears to have achieved working group consensus for adoption.
Consider Adoption of Renumbering Draft: Jen's draft on link-local addressing based on prefixes may be useful. The document is for consideration of adoption.

Next Steps

Evaluate evn6 placement. Discuss with the authors of the evn6 draft, and the chairs to evaluate whether the document suits the working group, or should be moved elsewhere.
Further discussion and clarification needed on renumbering draft Tim Winters to coordinate off-list with Jen on the content of the Renumbering draft.
Focus on Native Solutions for Multi-Homing: Re-evaluate the language regarding the native and translation based Multi-Homing solutions, to discourage the latter.
Discuss DNS preferences: Schedule a discussion about preferences for preferring IPv4 versus CLAT/NAT64 when both are available.